Ceph uniquely delivers “object, block, and file storage” in one unified system. Ceph is highly reliable, easy to manage, and free. The power of Ceph can transform your company’s IT infrastructure and your ability to manage vast amounts of data. Ceph delivers extraordinary scalability–thousands of clients accessing petabytes to exabytes of data. A Ceph Node leverages commodity hardware and intelligent daemons, and a Ceph Storage Cluster accommodates large numbers of nodes, which communicate with each other to replicate and redistribute data dynamically.
RADOS = Reliable Autonomic Distributed Object Store
The sole of ceph storage cluster is RADOS ( Reliable Autonomic Distributed Object Store ). Ceph uses powerful CRUSH ( Controlled Replication Under Scalable Hashing ) algorithm for optimize data placement , self managing and self healing. The RESTful interface is provided by Ceph Object Gateway (RGW) aks Rados GateWay and virtual disks are provisioned by Ceph Block Device (RBD)